The Mad-lion were one of the most powerful factions within the eastern borders. Having two Qi emperors was quite a huge force. Even Li Meng felt nervous by the thought of facing an emperor. Although he had managed to connect with so many Heavenly laws and could hold his ground against peak Qi Kings, but Qi Emperors were far beyond his limit.
QI Emperors were practitioners who have managed to use their law energy to completely transform their body. The hallmark of becoming a Qi Emperor was to form the body of law, and every single move of theirs would have law energy imbued in there.
He wasn't even sure about being able to contend with the lowest of emperors with the base of advanced Qi King. Only when he reaches the peak of Qi King level would he be able to kill them.